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ethos.bl.uk

https://ethos.bl.uk· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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ethos.bl.uk
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Mobile

Sponsored

Hosting Provider

Microsoft Azure
azure.microsoft.com

IP Address

150.171.109.198

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇰🇪 Nairobi, Kenya

ASN

AS8075

Organization

Microsoft Corporation

CDN

CDN

Performance

99

Core Web Vitals

Weight

First Contentful Paint
697 ms10%
Speed Index
906 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
904 KB
44 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

JAMstack
🔀 Hybrid
Decoupled
Frontend
Framework
Next.js
API
Data Source
Headless CMS
Sanity
Infrastructure
Hosting
Microsoft Azure
CDN
CDN

Detected API Sources

https://cdn.sanity.io/files/v5...https://cdn.sanity.io/files/v5...

Technology Stack

5 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

SEO Analysis

B79/100
25
3
0
Meta Tags15/15
Content8/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images7/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
E
ethos.bl.ukethos.bl.uk

The British Library - the national Library of the UK

Visit the national library of the UK. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Join us.

Title Length52 chars

Recommended: 50-60 chars (~309px / 580px)

Description Length153 chars

Recommended: 120-160 chars

Issues (0)

    3 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    511 URLs

    robots.txt

    3 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D44/100
    Bot Access
    20/25
    Machine Read.
    13/25
    Schema Data
    0/25
    Citation
    11/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:1%
    Words:372
    Token eff.:Optimal
    Sections/1K:29.6
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary28w
    Descriptive Headingsavg 3.5w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    87/100
    14
    Passed
    1
    Critical
    0
    Warnings
    Images & Alt Text
    18/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    13/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    6/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    72/100
    B
    91 mg
    CO₂e / view
    903.5 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    104 mg
    vs
    Returning (cached)
    52 mg
    Annual (10K/mo)
    11.0 kg
    Emission Segments
    Data Center
    5 mg
    Network
    27 mg
    Device
    60 mg
    Resource Breakdown
    JavaScript
    537.0 KB
    Images
    273.4 KB
    CSS
    19.0 KB
    Fonts
    23.2 KB
    HTML
    50.9 KB
    Green Hosting Verified
    Microsoft Azure
    Provider Match
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    100%Excellent
    Static / Informational

    HTTPS

    No WAF

    80d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    DigiCert Inc

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    19.01.2026

    Valid Until

    19.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    www.bl.uk

    SHA-256 Fingerprint

    35:6C:4D:EA:22:CB:23:DD:B4:51:48:12:08:DC:7E:DF:89:84:89:85...

    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-security-policy
    frame-ancestors 'self' https://sanitycms.bl.uk
    content-type
    text/html; charset=utf-8
    date
    Thu, 30 Apr 2026 16:38:32 GMT
    link
    </_next/static/media/Hind_Variable-s.p.0238s0aaxdc3z.woff2>;...
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    ethos.bl.uk

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Civic Cookie Control

    Cookie Consent Banner
    Civic Cookie Control
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Civic Cookie Control
    Privacy policy page linked

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    C
    67/100
    Mobile Friendly1 breakpoint
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    hindVariableFont

    WCAG AA
    77/100
    Readability
    /30
    24/30

    18px · LH 1.50

    Hierarchy
    /20
    12/20

    3.78x ratio

    WCAG
    /25
    21/25

    6.92:1 min contrast

    Performance
    /25
    20/25

    1 font · 1 req

    Heading Font

    hindVariableFont

    Sans68px

    Body Font

    hindVariableFont

    Sans18px

    Contrast Ratio

    6.92:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~36 CPL

    Narrow lines
    68px
    h1
    44px
    h2
    32px
    h3
    18px
    p

    ✅ Excellent readability: 18px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 47/100. Simplify sentences for wider reach.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.9:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

    ✅ Strong hierarchy: Headlines are 3.8x larger than body text.

    Buy on MyFontsFluid TypeFlesch 47

    Color Palette

    7 unique colors
    Light
    #f4f3ef
    Primary· 45.89999999999999%
    #0f1116
    Secondary· 23.099999999999998%
    #796256
    Secondary· 8.3%
    #2d2321
    Secondary· 8.1%
    #714c3b
    Secondary· 6%
    #4a3f39
    Secondary· 4.5%
    #bfb3aa
    Secondary· 3.9%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google AnalyticsFree
    Google Tag ManagerFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    23 Resources

    20
    Scripts
    3
    Styles
    19
    Async
    0
    Defer

    Top Script Sources

    local(16)googletagmanager.com(4)

    Website Identity

    ethos.bl.uk

    Location detected: 🇬🇧 United Kingdomvia tld
    en

    Sponsored

    Last analyzed: 30 Apr 2026 at 16:38

    Historical Analysis & Change Tracking